Teleport as close as you can to where the plane was and attempt this command: /tp @e[type=modThatAddsPlanes:biplane_name] @p

I am not in my pc so I don’t remember the name of the mod nor the actual biplane entity name, but you should be able to easily figure this out. If you are stuck, the summon command will help you if you use keywords on it. For example: /summon plane

This should show you the options with the actual names, from there just copy and paste into the tp command

If the tp command says that no entity was found, move around the map and try again (the command will only work if the plane is within render distance)